Recording instrument



Aug. 28, 1923.

F. CARPENTER RECORDING INsTRUMENT Filed: Oct. 26 1921 Patented Aug. 28, 1923.

UNITED STATES FORD A. CARPENTER, 0F LOS ANGELES, CALIFORNIA.

REGORDING INSTRUMENT.

Application filed October 26, 1921. Serial No. 510,550.

To a]? whom it may concern.

Be it known that I, Fonn A. CARPENTER, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Improvement in Recording Instruments, of which the following is a specification.

My invention relates to recording instruments and is particularly applicable to instruments adapted to register temperature and humidity, or temperature and altitude, or any two or more variable conditions.

A further object of my invention is to provide an instrumimt which will be compact and which will record in convenient form two or more sets of conditions over a considerable period.

A further object of my invention .is to provide an instrument which will produce a record of two or more conditions, which can be. readily interpreted. and which can be inspected at any time during the record- %urther objects and advantages will he made evident hereinafter.

.Ite't'erring to the drawings which are for illustrative purposes only:

Fig. 1 is a side elevation of one embodiment of my invention, with the case closed.

Fig. 2 is a similar view with the case open.

Fig. 3 is an end view partially in section showing the method in which the case opens.

In the form of my invention shown, two rollers 11 and 12 are pivoted in suitable structure, one or more of these rollers being driven from a clock mechanism, not shown. Passing around these rollers is a record 13 which consists of a continuous band of paper marked longitudinally with ordinates 15, the spaces between the ordinates representing time, and with abscissas it; theintervals between the abscissas representing temperature, humidity, altitude or thelikc.

For the purpose of recording .7 provide two reccsding members 20 and 21, which may be pens, holding a supply of ink snllicient for a considerable period. These pens are carried on arms 22 and pivoted at Q-l and 25, and actuated by tlltllllODlt-Bttll, hygrometer or barometer elements of any =-well known form. The method of applying such elements to moving pointers is well known in the art and will not. be described.

and transported. It is It will he noted that the two arms 2;? and. 23 are at opposite sides of the rollers ll and 12, and that they press upon points on the paper which would be diametrically op posit'e to each other. if the paper were removed and expanded to a cylindrical form. This paper can be conveniently operated at such a speed that there is a complete rotation thereof in 24 hours, in which case the two pens record, simultaneously, on lines which are 12 hours apart. that is, one pen is at 52 a. in. when the other pen is at 2 p. m. on the paper. It is quite essential to the raiding oi the record that. these pens be so spaced that the time interval between them is accurate and prcleral'ily an even number of time divisions.

For the purpose of improving the record, I provide arms 30, pivoted at ll, and actual ed by cams 32 driven by the driving mechanism and acting against fiat springs 1&3. These arms 30 are utilized to lift the pens 20 and 22 from the paper at. periodic and frequent intervals, so as to produce a dotted record which is quicker dryin and murh less likely to smear than a continuous one.

i mount. my complete structure inside an inner case 50, having a shallow cover SI. and a deep cover 52, each pivoted on a hinge 53. I provide in the cover 51 a transparent window 55, and in the cover 52 a transparent window 56, through which the records can be observed at any time.

The form of my invention has a utility in that it is flat rectangular, so that it can special and substantially be readily packed also arranged that practically the entire record can be ol'iserved through the Windows and 56. It par tienlarly suited for use in recording data in connection with aeroplane or balloon flights and. finds a considerable application in the arts, being used to record temperature and humidity, or other facts, in connection with industrial processes.

I claim as my invention:

1. A device for graphically recording the variations in two or more variables comprising: a sheet of paper having ordinates representing time' and abscissas represent-- ing values of said variables; two rollers having parallel axes around which said paper is passed the ends of said paper being joined to form a continuous band;- means for driving said paper at a uniform speed: a recording member pressing on said paper;

mechanism for moving said recording morn-- her along an abscissa through a distance equal to the momentary magnittule oi one of said 'ariahles; a second recording meinher pressing on said paper; and mechanism for moving said recording niemher along an abscissa through a distance equal to the Illt!ill(,nltl], magnitude of another variable, said two recording niemhers heing so adjusted that at any moment they rest upon two ditiereut ahscissas one of which is upon that portion ol the paper lying at one side of said rollers and the other of which is upon that portion of the paper lying on the other side ot' said rollers.

2. A device for graphica ly recording the variations in two or more variables com prising; a sheet Oil paper having ordinates representing time and ahscissas representing values ot' said variahies; two rollers having parallel axes around which said paper is passed the ends oi said paper being joined to Form a COhtiI'lilUttS hand; means For driving said paper at a uniform speed; a rccording member pressing on said paper: mechanism for moving said recoriiiing memher along an abscissa through a distance equal to the momentary magnitude of one of said variables; a second recording memiier pre ing on said paper; and mechanism tor moving said recording memher along an abscissa through a distance equal to the momentary magnitude oi" another variaihle, said two recording memhers heing so adjusted that at any moment they rest upon two ditlin'ent ahseissas, one of which is upon that portion of the paper lying at one side o'l' said roliers and the other oil which is upon that portion oi the paper lying on the other side oi said rollers.

3. A device for graphically recording the variations in two or more *ariahles comprising: a sheet of paper having ordinates representing time and ahscissas reru'esenting vaincs of said variables; two rollers having parallel axes around which said paper is passed the ends ot said paper being joined to form a continuous hand; means for driving said paper at; a nnitorni speed; a recording member pressing on said paper; means for periodically lifting said record ing means from said paper to produce a hroken record; mechanism for moving Said recording member along an abscissa through a distance equal to the momentary magnitude ol one of said variables; a second to cording memher pressing on said paper; and mechanism for moving said recording menr her along an ahseissa through a distance equal to the momentary magnitude of an other rariahle, said two recording members heing so adjusted that at any moment they rest upon two different ahscissas, one of which is upon that portion of the, paper lying at one side of said rollers and the other of which is upon that portion oil the, paper lying on the other side of said rollers. ii. in a recording instrument, the comhination ot': a tiat case having openings on either side thereof; two rollers in said case, one on one side oi. said openings and the other on the other side of said opening' a st rip oi paper passing around said rollers and presenting a flat surface in front, of each of said openings; and recording means for marking a record on said strip in such manner that said record is visihle through said openings.

in a recording instrument, the comliiualion ot'; a Hat case. having openings on either side thereot"; two rollers in said case one on one side of said openings and the. other on the other side of said openings; a strip of paper passing around said rollers and presenting a tlat surface in Front of each of said openings; and two recording means, one hearing and marking on that. portion of the paper strip visihle through one opening and the other hearing and FUR D A. (if AP. li lNTi lR. 

